David L. Strickland, NHTSA

Chip Somodevilla / Getty Images

Head of the National Highway Traffic Safety Administration David Strickland (R) stepped down from his post in late 2013. Acting Administrator David J. Friedman (not pictured) has overseen a turbulent year at the regulatory agency.

Head of the National Highway Traffic Safety Administration David Strickland (R) stepped down from his post in late 2013. Acting Administrator David J. Friedman (not pictured) has overseen a turbulent year at the regulatory agency. (Chip Somodevilla / Getty Images)

Head of the National Highway Traffic Safety Administration David Strickland (R) stepped down from his post in late 2013. Acting Administrator David J. Friedman (not pictured) has overseen a turbulent year at the regulatory agency.